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[Form 4] VICOR CORP Insider Trading Activity

Filing Impact
(Very High)
Filing Sentiment
(Very Negative)
Form Type
4

Rhea-AI Filing Summary

VICOR CORP Chairman and CEO Patrizio Vinciarelli reported selling 20,000 shares of common stock in open-market transactions. The trades occurred on June 9, 2026 at weighted-average prices ranging from about $260.42 to $294.23 per share, executed in multiple small blocks.

The filing states these sales were made under a pre-arranged Rule 10b5-1 trading plan adopted on February 26, 2026, which automates trading according to preset instructions. After these sales, he directly holds 8,687,690 shares of VICOR common stock and indirectly holds 167,125 shares as trustee of an irrevocable trust for his child.

Positive

  • None.

Negative

  • None.

Insights

CEO executes pre-planned sale of 20,000 VICOR shares, retains a very large stake.

Patrizio Vinciarelli, VICOR's Chairman, CEO and more-than-10% holder, sold 20,000 common shares on June 9, 2026 via multiple open-market trades. Prices ranged roughly from $260.42 to $294.23 per share, indicating execution across an intraday band.

The filing specifies the sales were carried out under a Rule 10b5-1 trading plan adopted on February 26, 2026, signaling the transactions were pre-scheduled rather than opportunistic. Following these dispositions, Vinciarelli still directly owns 8,687,690 shares and indirectly holds 167,125 shares as trustee of an irrevocable trust.

The sold amount is small relative to his remaining direct holdings, so this looks like a routine liquidity event rather than a major position change. Future Forms 4 would show whether similar 10b5-1 plan sales continue, but this single filing mainly updates the ownership record.

Insider VINCIARELLI PATRIZIO
Role Chairman and CEO
Sold 20,000 shs ($5.60M)
Type Security Shares Price Value
Sale Common Stock 400 $260.52 $104K
Sale Common Stock 400 $262.145 $105K
Sale Common Stock 500 $264.06 $132K
Sale Common Stock 429 $265.4946 $114K
Sale Common Stock 425 $266.8532 $113K
Sale Common Stock 446 $268.0841 $120K
Sale Common Stock 400 $268.4275 $107K
Sale Common Stock 400 $271.08 $108K
Sale Common Stock 295 $272.208 $80K
Sale Common Stock 677 $273.5851 $185K
Sale Common Stock 1,479 $274.4476 $406K
Sale Common Stock 800 $275.525 $220K
Sale Common Stock 495 $276.4872 $137K
Sale Common Stock 405 $278.1811 $113K
Sale Common Stock 536 $280.2563 $150K
Sale Common Stock 1,665 $281.294 $468K
Sale Common Stock 1,423 $282.1748 $402K
Sale Common Stock 2,336 $283.6146 $663K
Sale Common Stock 1,211 $284.69 $345K
Sale Common Stock 1,000 $285.6646 $286K
Sale Common Stock 770 $286.5643 $221K
Sale Common Stock 430 $287.2063 $123K
Sale Common Stock 800 $288.8694 $231K
Sale Common Stock 100 $289.25 $29K
Sale Common Stock 384 $290.8987 $112K
Sale Common Stock 516 $291.8698 $151K
Sale Common Stock 878 $293.3039 $258K
Sale Common Stock 400 $294.1025 $118K
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 8,687,690 shares (Direct, null); Common Stock — 167,125 shares (Indirect, See footnote)
Footnotes (1)
  1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $260.4200 to $260.6200. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (30) to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $261.9800 to $262.2200 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $263.7800 to $264.6000 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.3000 to $266.2500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3500 to $267.3050 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.3800 to $268.2800 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.4100 to $268.4500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.6200 to $271.5100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.7300 to $272.5700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.9400 to $273.8800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.1300 to $274.7400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2300 to $276.0800. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.2400 to $277.2100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.2700 to $278.2000. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $279.7700 to $280.7600. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.7700 to $281.7100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $281.8100 to $282.4500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $283.0500 to $283.9100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $284.0800 to $284.9400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $285.0900 to $286.0500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $286.1600 to $287.1100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.1900 to $287.2900. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288.2500 to $289.2200. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.2500 to $289.2500. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.6600 to $291.6400. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.6800 to $292.1700. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.8900 to $293.8100. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.9800 to $294.2300.
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
VINCIARELLI PATRIZIO
(Last)(First)(Middle)
C/O VICOR CORPORATION
25 FRONTAGE ROAD
(Street)
ANDOVER MASSACHUSETTS 01810
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
VICOR CORP [ vicr ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
XOfficer (give title below)Other (specify below)
Chairman and CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/09/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock167,125ISee footnote(1)
Common Stock06/09/2026S(2)400D$260.52(3)8,687,690D
Common Stock06/09/2026S(2)400D$262.145(4)8,687,290D
Common Stock06/09/2026S(2)500D$264.06(5)8,686,790D
Common Stock06/09/2026S(2)429D$265.4946(6)8,686,361D
Common Stock06/09/2026S(2)425D$266.8532(7)8,685,936D
Common Stock06/09/2026S(2)446D$268.0841(8)8,685,490D
Common Stock06/09/2026S(2)400D$268.4275(9)8,685,090D
Common Stock06/09/2026S(2)400D$271.08(10)8,684,690D
Common Stock06/09/2026S(2)295D$272.208(11)8,684,395D
Common Stock06/09/2026S(2)677D$273.5851(12)8,683,718D
Common Stock06/09/2026S(2)1,479D$274.4476(13)8,682,239D
Common Stock06/09/2026S(2)800D$275.525(14)8,681,439D
Common Stock06/09/2026S(2)495D$276.4872(15)8,680,944D
Common Stock06/09/2026S(2)405D$278.1811(16)8,680,539D
Common Stock06/09/2026S(2)536D$280.2563(17)8,680,003D
Common Stock06/09/2026S(2)1,665D$281.294(18)8,678,338D
Common Stock06/09/2026S(2)1,423D$282.1748(19)8,676,915D
Common Stock06/09/2026S(2)2,336D$283.6146(20)8,674,579D
Common Stock06/09/2026S(2)1,211D$284.69(21)8,673,368D
Common Stock06/09/2026S(2)1,000D$285.6646(22)8,672,368D
Common Stock06/09/2026S(2)770D$286.5643(23)8,671,598D
Common Stock06/09/2026S(2)430D$287.2063(24)8,671,168D
Common Stock06/09/2026S(2)800D$288.8694(25)8,670,368D
Common Stock06/09/2026S(2)100D$289.25(26)8,670,268D
Common Stock06/09/2026S(2)384D$290.8987(27)8,669,884D
Common Stock06/09/2026S(2)516D$291.8698(28)8,669,368D
Common Stock06/09/2026S(2)878D$293.3039(29)8,668,490D
Common Stock06/09/2026S(2)400D$294.1025(30)8,668,090D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. These shares are held by the reporting person as Trustee of the Patrizio Vinciarelli Irrevocable Trust U/A Dated 12/21/2012, established for the benefit of the child of the reporting person.
2. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 26, 2026
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $260.4200 to $260.6200. The reporting person undertakes to provide to Vicor Corporation, any security holder of Vicor Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes (3) through (30) to this Form 4.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $261.9800 to $262.2200
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $263.7800 to $264.6000
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $265.3000 to $266.2500.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $266.3500 to $267.3050
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $267.3800 to $268.2800
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $268.4100 to $268.4500.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $270.6200 to $271.5100.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $271.7300 to $272.5700.
12. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $272.9400 to $273.8800.
13. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $274.1300 to $274.7400.
14. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $275.2300 to $276.0800.
15. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $276.2400 to $277.2100.
16. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $277.2700 to $278.2000.
17. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $279.7700 to $280.7600.
18. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $280.7700 to $281.7100.
19. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $281.8100 to $282.4500.
20. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $283.0500 to $283.9100.
21. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $284.0800 to $284.9400.
22. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $285.0900 to $286.0500.
23. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $286.1600 to $287.1100.
24. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $287.1900 to $287.2900.
25. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $288.2500 to $289.2200.
26. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $289.2500 to $289.2500.
27. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $290.6600 to $291.6400.
28. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $291.6800 to $292.1700.
29. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $292.8900 to $293.8100.
30. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $293.9800 to $294.2300.
/s/Quentin A. Fendelet Attorney in Fact for Patrizio Vinciarelli06/10/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR